Compatibility: IBM AT, Windows98/2000/XP Communication: PS2, USB, COMBO(USB+PS2)
Port Color: any color as require

The colorfast printed letters won't come off even after long periods of time. No noise while typing
Harmless to the human body with excellent softness
Portable with the proper size to fold or roll
Resistance to the water or dust
Easy to work for its round shape design
Excellent and various in colors
Long durability (one million life cycle of key)